Pentaquarks in the medium in the quark-meson coupling model

We calculate the properties of the pentaquarks ${\Theta }^{+}$ and ${\Xi }^{--,0}$ in symmetric nuclear matter using the quark-meson coupling model (QMC). The stability of the ${\Theta }^{+}$ in the medium with respect to the channel ${\Theta }^{+}\to {\mathit{NK}}^{+}$ is discussed.

Figure 1

Effective masses of the pentaquarks ${\Theta }^{+}$ and ${\Xi }^{--,0}$ within the QMC and the NLWM models.

Figure 2

Effective masses of the pentaquarks ${\Theta }^{+}$ and ${\Xi }^{--,0}$.

Figure 3

Radius of the ${\Theta }^{+}$, nucleon, and kaon as a function of density.

Figure 4

Optical potentials obtained with the QMC model.

Figure 5

Chemical potentials of the ${\Theta }^{+}$ and the ${\mathit{NK}}^{+}$ system.